tartamudo

Cojones, Garces, cogemos a uno y tenía que ser tartamudo.

Damn it, Garces, we get one and it had to be a stutterer.

— El laberinto del fauno (2006)

Soy tartamudo.

I stutter.

Tom es tartamudo.

Tom stutters.

Bill Walton era tartamudo.

Bill Walton was a stutterer.